Chevrolet presented the 2011 Silverado HD at the Chicago Auto Show, a model that comes with several enhancements for model year 2011. Feature highlights for the new model include the all-new, fully-boxed frame assemblies, stronger independent and new asymmetrical leaf-spring rear suspensions, a strengthened 6.0L Vortec 6L90 standard power unit, a new, exclusive exhaust brake system, larger brakes, improved handling and steering, 170-degree-opening rear access doors on extended cab models and sta… (read more)